Comment by csuwldcat

The underlying CTAP implementations are only used by the platform to facilitate core activities, they are not used to expose key pairs to external parties. Please link to where any API offers up public keys to external userland actors, and any use of said APIs beyond core credential management. If this is assumed insecure/exposed, it would mean the system and its guarantees cannot be trusted as advertised, given both keys are supposed to be handled as a secure, opaque bundle, disclosed to no one beyond the bound origin at create time.